Electrical protective device



J. J. LODGE. ELECTRICAL PROTECTIVE DEVICE.

APPLICATION FILED DEC. 18. 1918.

Patented Dec. 6, 1921.

wattage or to employ an electrical iron,

heater or the like, notwithstanding the de- JAMES J. Loren, or new roan,n. v.

ELECTRICAL PROTECTIVE nnvron.

Specification of Letters Patent.

Patented Dec. e, 1921.

Application filed December 18, 1918. Serial No. 267,225.

To all whom it may concern:

Be it knownthat I, JAMns J. Loner, a sub ect of theKing of GreatBritain, residing at borough of Manhattan, city, county,

and State of New York, have invented new and useful Improvements inElectrical Protective Devices, of which the following is a aspecification.

This invention relates to protective devices for electrical apparatus.

In the use of standard lamp] or wall sockets, and similar contactdevices it is within the power of any guest or other party infa hotel orsimilar abode to replace any lamp by a lamp of higher electrical siresof the party in control to the contrary. An object ofthis invention isto provide means for precluding the, insertion within "any standard orsimilar electrical contact device, such as electrical lamp orwallsockets, or the like, of lamps, plugs or like electrical attachment orconsumption device undesired bythe partyin control ofsuch electricalsockets oro-ther contact means. Thus,

in accordancewith my invention, in hotel and similar uses, the party incontrol may 7 provide forlampsor other consumption of ets or othercontact means, and accordingly regulate the use of electrical irons,heaters, stoves,and the hke, of h s own choosing.

his choosing to be used with the lampsock- In accordance with the mostpreferred forms of my invention, means are provided to be insertedwithin any standard or similar socket or other electrical contact deviceand the lamp orother attachment or con-' sumption device desired bytheparty in control to be used in such socket reduced in diameter orotherwise modified or special lamp or other electrical apparatusprovided, 1 enabling such desired lamp or other apparatus to be readilypositioned in operative relation with the contacts of the socket orothercontact means but precluding the use of any standard lamp orstandard plug. 0

Further features and objects of the 1nvention will be morelullyunderstood from panying drawings, in whichthe following descriptionand the accom- Figure 1 shows in central section a stand ard' sockethaving my insert means positioned therein; p a y Fig. 2 is a sectionalelevat on of my eans removed iron; the seeker;

Fig. 3 is a face view of a disk, optionally used as a part of my insertmeans;

Fig. i is a side elevation of a plug adapted to co'clperate with myinsert means to be positioned within the socket in operative relattiionwith the electrical. contacts thereof; an

Fig. 5 is a side elevation of an electrical lamp adapted in cooperationwith my insert means to be inserted within the electrical socket.

Referring to the drawings, the socket 1 is shown as of usual standardconstruction comprising the inner threaded metal contact or shell 2adapted to be connected to one line of the circuit and the rearwardlydisposed button 3 adapted to be connected to the oppositeline of thecircuit.

My insert means comprises the sleeve portion 4: which may be threaded,say for example two and one-half or three threads and accordingly ofapproximately one-half of the length of the metal contact shell 2. Suchsleeve portion. 4 may be of insulating material, or may be of conductingmaterial, in which latter instance, I provide the insulating member 5,such as a disk of insulating material having the substantially centralopening 6.

If desired, such disk 5 may be secured to the rearward portion oi? thesleeve 4:, as by providing the sleeve 4; with the crimped thuspractically hidden from view, parti-cu- Y larly when the sleeve l ismade of the same metal as the shell 2.

The attachment or consumption device desired to be used in the socket,as thus provided with my insert means, is provided with threads of itscontact reduced. or otherwise modified in accordance with the insertmeans, say from two and one-half threads,

whereby the contact of such attachment or consumption device is-receivedwithin my insert means and electrical connection effected. Thus, thestandard plugs, lamps and the like may be utilized with my invention bypressing in the required number of tllleeds- Spec al plugs or lamps orthe initially provided with the reduced or modifiedcontact, may also beutilized with my invention. i

In Fig. 4, I have'indicated the plug? having its foremost threadsreduced in diameter, relative to the remaining threads 10. In Fig. 5, Ihave shown a lamp 8 having orequivalent,

- The control afforded my invention enables di'fierentfforms, c'. e,difierent d ameters of'ins'ert means to be provided respectivelyforlampsand plugs, and thus restrict certain sockets" for lamp use .andcertain I other sockets for use with plugs ofcurlers,

stoves and theilike, respectively. Such regulate'd control is readilycarriedout-by reason or the relatively small variations in dimensionselfective in permitting the desired consumption device tobe inserted butprecludingthe; insertionofany undesired consumptionzdevi'ce. 7 V p 7Whereas Iliave described my invention -byre'i eren ce to specificfor'msthereof, it will be understood that many changes and modi- ,fications"may be made without departing 35 V by the appended claims.

from the. spirit of the invention as defined I claim terial serving asone contact and of predetermined'depth for receiving .the base of anelectrical lamp or plug, said socket having its other contactinsulatingly mounted interiorly of said hollow member of protectingmeans comprising a hollowfelementhaving an outer diameter lessthan thesaid uni-- form diameter of said recess and positioned within saidrecess, said protecting device when in position in said recessfreelyexposing. the contacts ofsaid socket for elecbase of the lamp or theplugeirtends through sa d hollow member to afford electrical con tricalconnectiom'said hollow element hav- 7 ing a length appreciably less thansaid predetermined depth of saidrecess, whereby upon insertion of thelamp or the plug the nection between the contacts of the socketrespectively with the contacts of said base respectively. s, 7

"The combination with an I electrical socket havinga receivingopening ofa'pre- V and a threaded contact disposed, Withinsa d pesin nd anotherconth t di posed rearwardly within saidopcnsocket having determined,posed within said receiving opening, said hollow member having a lengthappreciably less than said predetermined depth, said hollow member beingopen at its outwzmlnnd inward ends to provide free electrical access tosaid another contact.

3. The combination with an electrical a receiving opening of a preepthand a threaded contact disposed within said opening and another contactdisposed rearwardly within said opening, of'a hollow threaded member inelectrical connection-with said threaded contact and insulated from saidanother contact and disposed within said receiving opening, said hollowmember having a length a preciably less than said predetermined rfrpth,said hollow member being opentatitsoutward and inward ends to providefree'electrieal access to said another contact.

4. The combination of an electricalsocket comprising a hollowcircular-shell serving as one contact, a base of insulating material anda second contact mounted on said base and a second cont-act mountedon'said base '1. The combination with an electrical 1 socketprovidedwith a uniform circular hollow member of electrically conductingmaand within said shell, of protecting means comprising. a perforatedhollow circular 'vide direct electrical access to said second contactthrough said hollow circular member and said member ofinsulatingmaterial;

6. The combination with an electrical socket having, a threadedshellser-ving as one contact and a second contact disposed rearwardly ofthe opening of said shell, of a threaded hollow member having a lengthless than the length of said threadedshell and disposed within saidshelha member of insulating material disposed between said threadedmember and said second contact but exposing said second contact andabaseof an electrical: attachment device having its end threads reduced inexterior diameter,

I whereby upon insertion of such plug within said socket,-said reducedthreading of said plug extends through said threaded m'omber andsaid-insulating member to-establish contact with said threaded shell andsaid second contact of said socket.

.7. The combination with an electrical socket comprising .a' hollowBhallserfing as one contact, a base of insulating material and a secondcontact mounted on said base, of a hollow circular member constructed tobe positioned within said shell, said hollow member having open ends anda base of an electrical device being threaded throughout its outer faceserving as a contact and constructed to engage in electrical connectionwithin said shell, said threaded face having for a certain portionthereof a threading of a determined diameter and the remaining portionfor an appreciable extent being of reduced outer diameter and projectingthrough said hollow member.

8. The combination of an electrical socket base of said shell,protecting means comprising a hollow circular element constructed toslidingly engage said circular shell, said hollow circular element beingopen at its inward and outward ends, a perforated disk of insulationdisposed between the inward end of said hollow circular element and saidsecond contact and a base of an electrical attachment device having itsforward portion of relatively less cross section and extending Withinsaid hollow circular element and its rearward portion of relativelygreater cross seciiion to electrically engage said circular she I.

In testimony whereof I have signed this specification this 9th dav ofDecember 1918.

JAMES J. LODGE.

